"Police officers armed like stormtroopers rained tear gas on Ferguson, Missouri, fired rubber bullets into crowds, and arrested journalists charging their cell phones in a McDonald's last night. As my colleague James Fallows pointed out, the transformation of America's police officers into high-tech warriors has a long history. Armored trucks "intended for an overseas battlefield," M-16 rifles and grenade launchers have become everyday tech in local police departments across the country. Although military technology has arguably given law enforcement an unreasonable amount of power, there is another piece of technology that could help restrain the militarization of America's police in the future: a camera. Ferguson police reportedly ordered civilians to turn off cameras and recording devices on Wednesday. But what would have last night looked like if the police had to wear their own devices?"